M 2275 (OTTO) Metol, 99% Cas 55-55-0 - used to synthesize arylidene amino azolones with anticancer activity. M 2275 (OTTO) Metol, 99% Cas 55-55-0 - used to prepare N-(4-hydroxyphenyl)retinamide analogs with antitumor and apoptosis-inducing activities.